Abstract: | ![]() Rourke's present edited work, a welcome sequel or "companion volume" to his 1985 book, focuses primarily on evaluating the internal and external validity of existing learning disabilities (LD) typologies within a "confirmatory hypothesistesting framework" initially described by Skinner (1981). Within this framework, studies examining the internal validity of typologies are concerned with issues relating to their reliability and replicability (i.e., the degree to which the typologies' derivation is independent of specific statistical or sampling techniques). External validation studies, on the other hand, attempt to demonstrate that reliably-derived subtypes differ in a meaningful and predictable manner on variables (i.e., external criteria) not initially used to develop the typology. This edited volume will be of interest to research scientists, both within and outside the realm of neuropsychology, interested in classification theory and methods; to clinicians faced with the dual tasks of assessing disabled learners and facilitating rational and productive instructional decisions; and to academics, especially at the college and university level, entrusted with the education of learning-disabled adults. (PsycINFO Database Record (c) 2010 APA, all rights reserved) |